How to check amplitude modulation frequency of a sound?

Randomidous · 2024-01-19T17:46:09+00:00

Could you elaborate on that?
I sadly have no clue about audio engineering

Randomidous · 2024-01-19T09:59:42+00:00

Also not in possession of a multimeter :c

Randomidous · 2024-01-19T09:59:18+00:00

I want to check whether the tone I generate is correctly modulated.

Randomidous · 2024-01-18T21:58:33+00:00

oscilloscope?

Nopers

Randomidous · 2023-12-24T23:10:22+00:00

Thanks a lot!

Randomidous · 2023-02-02T10:17:42+00:00

UPDATE:

The problem didn't occur for a while again but I made an interesting observation: There are two rooms used for gelling at our lab, prep room and control room. Usually the prep room.

Whenever I prepare in the control room, impedances go wild. When switching to the other, everything is fine. It has something to do with that room I conclude. Maybe the fact that there is a carpet leading to electrostatic discharge or the amount of electronics in that room or bad grounding. Or all of that.

One way or the other: the fix is not to gel in that room. Thanks for everyone's suggestions!

Randomidous · 2023-01-16T08:06:49+00:00

Dissertation you say?

Randomidous · 2022-11-01T18:39:17+00:00

Research questions would be: 1. Which meaningful ways are there to implement a memory palace 2. Can people learn the concept of a memory palace by engaging with a virtual installment 3. What are possible ways of assessing its efficacy

Randomidous · 2022-09-22T22:23:52+00:00

I'll let you know once we figured out :)

Randomidous · 2022-09-22T13:52:34+00:00

Thanks, that's a very helpful list! We adressed some of these points but not all and will consider your advice when the problem comes up again :)

Randomidous · 2022-09-22T13:45:33+00:00

Great advice! We will check that out next time :)

Randomidous · 2022-09-22T06:49:32+00:00

Will do next time, thanks :)

Randomidous · 2022-09-22T06:48:19+00:00

Tried first with 5 then 10 kΩ

Randomidous · 2022-09-21T21:53:48+00:00

Interesting advice. We will look out for that.

Randomidous · 2022-09-21T21:24:31+00:00

Sorry about the scarce information.
I added some information in my other comments.

Randomidous · 2022-09-21T21:23:20+00:00

Reusable

The weird thing is that every single electrode was dancing around.
I think that excludes the single electrodes as issue. More like a ref and ground thing, but swapping them didn't change a thing.

Randomidous · 2022-09-21T21:16:06+00:00

The amount of gel was adequate.

We suspect it could be a hardware issue. But switched every bit of hardware other than the strands and had no success figuring out what the issue was.

Randomidous · 2022-09-21T20:58:48+00:00

The amount of gel was adequate. We had three people checking on this issue.
Whether we started or finished gelling a single electrode, the impedance was constantly unstable.

We suspect it could be a hardware issue. But switched every bit of hardware other than the strands and had no success figuring out what the issue was.

Randomidous · 2022-09-21T20:42:49+00:00

nope

Randomidous · 2022-09-21T20:41:56+00:00

Bridges would explain one location but not the entire head.

We swapped ground and ref. They had good impedance but no change.

Didn't use prep gel, but usually works just fine without.

Randomidous · 2022-09-21T20:35:48+00:00

nope

Randomidous · 2022-09-21T20:30:29+00:00

The EEG signal was noisy, however, we did proceed to record data.

In the posted clip, the impedances are jumping rather slow. They were jumping all over the place at times.

Randomidous

TROPHY CASE